# US 11,909,491 B2 · Beam switching gap configuration at longer cyclic prefix positions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,491 B2 - Document ID: US11909491B2 - Status: Granted - Kind: B2 - Application number: 17/583,068 - Filed: 2022-01-24 - Published: 2022-08-04 - Granted: 2024-02-20 - Earliest claimed: 2021-02-01 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Iyab Issam Sakhnini; Tao Luo; Xiaoxia Zhang; Jing Sun; Yan Zhou - Web page: https://patentgrep.com/patent/US11909491B2 ## CPC - H04L 27/2607: {Cyclic extensions} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 27/2602: {Signal structure} - H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)} - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Example implementations include a method, apparatus and computer-readable medium of wireless communication. A user equipment (UE) may receive a configuration indicating whether a beam switching gap is expected at a first symbol position within a subframe of a physical channel for the UE, the first symbol position having a first cyclic prefix length that is longer than a second cyclic prefix length of a second symbol position within the subframe of the physical channel for the UE. The UE may determine whether a transmission includes a missing symbol for the beam switching gap based on the configuration and the symbol position of a symbol where a beam switch is scheduled. ## Claims ### Claim 1 An apparatus for wireless communication for a user equipment (UE), comprising: a memory storing computer-executable instructions; and at least one processor coupled to the memory and configured to execute the computer-executable instructions to: receive a configuration indicating whether a beam switching gap is expected at a first symbol position within a subframe of a physical channel for the UE, the first symbol position having a first cyclic prefix length that is longer than a second cyclic prefix length of a second symbol position within the subframe of the physical channel for the UE; and determine whether a transmission includes a missing symbol for the beam switching gap based on the configuration and the symbol position of a symbol where a beam switch is scheduled. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the first symbol position occurs at one or more symbols after a 0.5 millisecond boundary at a start of the subframe and at a middle of the subframe. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the configuration indicates whether the beam switching gap is expected at the second symbol position of the transmission. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein a beam switching gap is expected at the second symbol position of the transmission regardless of the configuration. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the at least one processor is configured to change beams during a cyclic prefix of the symbol where the beam switch is scheduled in response to determining that the transmission does not include the missing symbol for the beam switching gap. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the at least one processor is configured to change beams during the missing symbol in response to determining that the transmission includes the missing symbol for the beam switching gap. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the beam switching gap for the first symbol position is the same as the beam switching gap for the second symbol position. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the beam switching gap for the first symbol position is different than the beam switching gap for the second symbol position. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the at least one processor is configured to transmit an indication of a capability of the UE to change beams within a time period, wherein the configuration is based on the capability. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the configuration is applicable when the transmission has a sub-carrier spacing greater than a threshold value. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the configuration is applicable to a bandwidth part for the transmission. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the physical channel is one of a control channel or a data channel. ### Claim 13 An apparatus for wireless communication for a base station, comprising: a memory storing computer-executable instructions; and at least one processor coupled to the memory and configured to execute the computer-executable instructions to: transmit a configuration indicating whether a beam switching gap is expected at a first symbol position within a subframe of a physical channel for a user equipment (UE), the first symbol position having a first cyclic prefix length that is longer than a second cyclic prefix length of a second symbol position within the subframe of the physical channel for the UE; and determine whether a transmission includes a missing symbol for the beam switching gap based on the configuration and the symbol position of a symbol where a beam switch is scheduled. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the first symbol position occurs at one or more symbols after a 0.5 millisecond boundary at a start of a subframe and at a middle of the subframe. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein the configuration indicates whether the beam switching gap is expected at the second symbol position of the transmission. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein a beam switching gap is expected at the second symbol position of the transmission regardless of the configuration. ### Claim 17 (depends on 13) The apparatus of claim 13, wherein the at least one processor is configured to change beams during a cyclic prefix of the symbol where the beam switch is scheduled in response to determining that the transmission does not include the missing symbol for the beam switching gap. ### Claim 18 (depends on 13) The apparatus of claim 13, wherein the at least one processor is configured to change beams during the missing symbol in response to determining that the transmission includes the missing symbol for the beam switching gap. ### Claim 19 (depends on 13) The apparatus of claim 13, wherein the beam switching gap for the first symbol position is the same as the beam switching gap for the second symbol position. ### Claim 20 (depends on 13) The apparatus of claim 13, wherein the beam switching gap for the first symbol position is different than the beam switching gap for the second symbol position. ### Claim 21 (depends on 13) The apparatus of claim 13, wherein the at least one processor is configured to receive an indication of a capability of the UE to change beams within a time period, wherein the configuration is based on the capability. ### Claim 22 (depends on 13) The apparatus of claim 13, wherein the configuration is applicable when the transmission has a sub-carrier spacing greater than a threshold value. ### Claim 23 (depends on 13) The apparatus of claim 13, wherein the configuration is applicable to a bandwidth part for the transmission. ### Claim 24 (depends on 13) The apparatus of claim 13, wherein the physical channel is one of a control channel or a data channel. ### Claim 25 A method of wireless communication, comprising, at a user equipment (UE): receiving a configuration indicating whether a beam switching gap is expected at a first symbol position within a subframe of a physical channel for the UE, the first symbol position having a first cyclic prefix length that is longer than a second cyclic prefix length of a second symbol position within the subframe of the physical channel for the UE; and determining whether a transmission includes a missing symbol for the beam switching gap based on the configuration and the symbol position of a symbol where a beam switch is scheduled. ### Claim 26 (depends on 25) The method of claim 25, wherein the first symbol position occurs at one or more symbols after a 0.5 millisecond boundary at a start of the subframe and at a middle of the subframe. ### Claim 27 (depends on 25) The method of claim 25, further comprising changing beams during a cyclic prefix of the symbol where the beam switch is scheduled in response to determining that the transmission does not include the missing symbol for the beam switching gap. ### Claim 28 (depends on 25) The method of claim 25, further comprising changing beams during the missing symbol in response to determining that the transmission includes the missing symbol for the beam switching gap. ### Claim 29 (depends on 25) The method of claim 25, further comprising transmitting an indication of a capability of the UE to change beams within a time period, wherein the configuration is based on the capability. ### Claim 30 A method of wireless communication, comprising, at a base station: transmitting a configuration indicating whether a beam switching gap is expected at a first symbol position within a subframe of a physical channel for a user equipment (UE), the first symbol position having a first cyclic prefix length that is longer than a second cyclic prefix length of a second symbol position within the subframe of the physical channel for the UE; and determining whether a transmission includes a missing symbol for the beam switching gap based on the configuration and the symbol position of a symbol where a beam switch is scheduled.